Why do Subaru cars have multiple catalytic converters?
Why do Subaru cars have multiple catalytic converters?
Subaru Motors has employed multiple catalytic converters on its vehicles for many years now. Because the engine compartments are small and since the catalysts need heat to operate effectively, Subaru designed smaller converters and integrated them into the exhaust pipes–rather then employ a single, larger converter as most cars did at one time.
Why do Subaru converters need to be replaced?
It is not uncommon to see yet another converter downstream integrated in the construction of an intermediate pipe. With so many converters, one of them is bound to need replacement at some point. The walls of the shell on the Subaru converters are designed thin in order to reduce the resistance of exhaust gases.
Can a bad catalytic converter lead to engine failure?
A bad or clogged catalytic converter can ultimately lead to engine failure, so it’s important to address the issue promptly. However, having catalytic converter problems doesn’t necessarily mean that the converter has to be replaced.
Can a catalytic converter be repaired without replacing the ECM?
Exhaust leaks are common and can skew oxygen sensor readings without setting other DTCs. A careful search might reveal exhaust leaks that, when repaired, “restore” catalytic converter function, at least from the point of view of the ECM.
A bad or clogged catalytic converter can ultimately lead to engine failure, so it’s important to address the issue promptly. However, having catalytic converter problems doesn’t necessarily mean that the converter has to be replaced.
Exhaust leaks are common and can skew oxygen sensor readings without setting other DTCs. A careful search might reveal exhaust leaks that, when repaired, “restore” catalytic converter function, at least from the point of view of the ECM.
What does Italian tune-up do for catalytic converter?
If the engine control module (ECM) detects a catalytic converter problem, it might record DTC P0420, defined as “Catalyst System Efficiency Below Threshold.” The “Italian Tune-Up” is a common fix for a range of automotive problems, including a clogged catalytic converter.
Can a lazy oxygen sensor cause a catalytic converter problem?
You may need to fix other engine problems in order to solve your catalytic converter problem. A lazy oxygen sensor might falsely indicate a catalytic converter problem, yet not set a DTC for itself. A technician can determine if the sensor is responding as it should.
